Online Books by
P. L. Hibbard
(Hibbard, P. L. (Paul Llewellyn), 1866-1947)
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Hibbard, P. L. (Paul Llewellyn), 1866-1947: Alkali soils : origin, examination, and management (University of California, College of Agriculture, Agricultural Experiment Station, 1937) (page images at HathiTrust)- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Alkali soils : origin, examination, and management (University of California, College of Agriculture, Agricultural Experiment Station, 1925) (page images at HathiTrust)
- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Commercial fertilizers (Agricultural Experiment Station, 1919) (page images at HathiTrust)
- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Commercial fertilizers (Agricultural Experiment Station, 1915) (page images at HathiTrust)
- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Commercial fertilizers (Agricultural Experiment Station, 1916) (page images at HathiTrust)
- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Commercial fertilizers (Agricultural Experiment Station, 1917) (page images at HathiTrust)
- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Commercial fertilizers (Agricultural Experiment Station, 1918) (page images at HathiTrust)
- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Commercial fertilizers and soil fertility in California (College of Agriculture, University of California, 1931) (page images at HathiTrust)
- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Liming the soil (University of California, College of Agriculture, Agricultural Experiment Station, 1926) (page images at HathiTrust)
- Hibbard, P. L. (Paul Llewellyn), 1866-1947: Potash from tule and the fertilizer value of certain marsh plants (Agricultural Experiment Station, 1917) (page images at HathiTrust)
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